6797-17-7Relevant articles and documents
Iodoalkyne-Based Catalyst-Mediated Activation of Thioamides through Halogen Bonding
Matsuzawa, Akinobu,Takeuchi, Shiho,Sugita, Kazuyuki
, p. 2863 - 2866 (2016/10/25)
Halogen bonding catalysis has recently gained increasing attention as a powerful tool to activate organic molecules. However, the variety of the catalyst structure has been quite limited so far. Herein, we report the first example of the use of an iodoalkyne as a halogen bond donor catalyst. By using an iodoalkyne bearing a pentafluorophenyl group as a catalyst, thioamides were efficiently activated and reacted with 2-aminophenol to generate benzoxazoles in good yield. Mechanistic studies, including 13C NMR spectroscopic analysis and several control experiments, provided concrete evidence that this catalytic activation is based on halogen bonding. Thus, the results obtained in this study demonstrate that iodoalkynes can serve as a new scaffold for future development of halogen bonding catalysis.
Efficient aerobic oxidative synthesis of 2-substituted benzoxazoles, benzothiazoles, and benzimidazoles catalyzed by 4-Methoxy-TEMPO
Chen, Yong-Xing,Qian, Ling-Feng,Zhang, Wei,Han, Bing
supporting information; experimental part, p. 9330 - 9333 (2009/05/15)
(Chemical Equation Presented) Setting the TEMPO: The scheme shows the efficient aerobic synthesis of 2-substituted benzoxazoles, benzothiazoles, and benzimidazoles where 4-methoxy-2,2,6,6-tetramethyl-1-piperidinyloxy free radical (4-Methoxy-TEMPO) is used as the catalyst.